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<div class="title">cryptolib.cpp</div>  </div>
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<a href="cryptolib_8cpp.html">gehe zur Dokumentation dieser Datei</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="cryptolib_8h.html">cryptolib.h</a>&quot;</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;</div>
<div class="line"><a name="l00012"></a><span class="lineno"><a class="code" href="classCryptoLib.html#a9a768b035de8adf42d1a2858847eb04d">   12</a></span>&#160;<a class="code" href="classCryptoLib.html#a9a768b035de8adf42d1a2858847eb04d" title="Der Konstruktor zu CryptoLib.">CryptoLib::CryptoLib</a>(<span class="keywordtype">int</span> MOD, <span class="keywordtype">int</span> ADD, <span class="keywordtype">int</span> crypttype){</div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;</div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;    <span class="comment">//Caesart</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;    <span class="keywordflow">if</span> (crypttype == 0)</div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;    {</div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;        this-&gt;MOD=MOD;</div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;        this-&gt;ADD=ADD;</div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;    }</div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;}</div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;</div>
<div class="line"><a name="l00027"></a><span class="lineno"><a class="code" href="classCryptoLib.html#a8e545f7126e200633990dcacbc423540">   27</a></span>&#160;QString <a class="code" href="classCryptoLib.html#a8e545f7126e200633990dcacbc423540">CryptoLib::easy_crypt</a>(<span class="keywordtype">int</span> MODE, <span class="keywordtype">string</span> text){</div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;    <span class="keywordtype">char</span> tmp[256];</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;    <span class="keywordtype">char</span> encrypted[256];</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;    strcpy(tmp,text.c_str());</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;    <span class="keywordflow">if</span>(MODE==ENCRYPT){</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;        <span class="keywordflow">for</span>(<span class="keywordtype">int</span> nr=0;nr&lt;text.length();nr++){</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;            <span class="keywordtype">int</span> base = ((int)tmp[nr])-97;</div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;            encrypted[nr] = Vector[(base+ADD)%MOD];</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;        }</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;    }<span class="keywordflow">else</span> <span class="keywordflow">if</span>(MODE==DECRYPT){</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;        <span class="keywordflow">for</span>(<span class="keywordtype">int</span> nr=0;nr&lt;text.length();nr++){</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;            <span class="keywordtype">int</span> base = ((int)tmp[nr])-97;</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;            encrypted[nr] = Vector[(base+MOD-ADD)%MOD]; <span class="comment">// inverse</span></div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;        }</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;    }</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;    encrypted[text.length()]=<span class="charliteral">&#39;\0&#39;</span>;</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;    <span class="keywordflow">return</span> ((QString::fromStdString(<span class="keywordtype">string</span>(encrypted))));</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;}</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;</div>
<div class="line"><a name="l00052"></a><span class="lineno"><a class="code" href="classCryptoLib.html#a0bfee42d7f568602f341623352b6b135">   52</a></span>&#160;QByteArray <a class="code" href="classCryptoLib.html#a0bfee42d7f568602f341623352b6b135">CryptoLib::ByteXOR</a>(QByteArray inputfile, QByteArray key)</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;{</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;    QByteArray result;</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;    <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i = 0 , j = 0; i &lt; inputfile.length(); ++i , ++j)</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;    {</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;      <span class="keywordflow">if</span>(j == key.length())</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;        j = 0; <span class="comment">// so lange wiederholen bis inputfile.length() &lt; data.length()</span></div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;      result.append(inputfile.at(i) ^ key.at(j));</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;    }</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;    <span class="keywordflow">return</span> result;</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;}</div>
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